What is mizzen?

A mizzen is a triangular sail positioned at the aft of a sailing vessel's mainmast. The mizzen is used to help balance the ship and improve its maneuverability. On larger sailing ships, a smaller second mizzen sail may be used, which is known as the jigger. The mizzen is typically smaller than the main sail of the vessel and is commonly used on ketches, yawls, and schooners. The term "mizzen" is derived from the French word "misaine," which means "fore and aft sail."